Dear Manager,

Good day!                                                 
It is my honor to write to you with keen hope to open a business relationship with you, I obtained your info from the Internet.
Changsheng Industry Co., Ltd. is a factory specialized in PCB manufacturing. We can supply rigid, flex and rigid-flex pcbs, 
all of our finished products meet IP2/IP3 standard.
Our General Capabilities,
Layer count: 1-40 Layers
Material: FR4, High Tg, Alu, Rogers, Halogen free, Black Core.
Min Planted Thru Hoels: 0.006" (0.15 mm)
Min Aspect Ratio: 20:1 (THK:DHS)
Max copper weight: 6 oz
Min Trace/Space: 0.003"/0.003" (0.076/0.076mm)
Thickness: 0.0083"/0.275"
Finish: HASL, Lead-free HASL,Gold plating, Hard Gold, Immersion Gold, Immersion Silver, Immersion Tin, OSP.
Special techniques: Blind and buried vias (min holes size is 0.2mm), high layer with heavy copper.
For more information, we would like to let you know our company web:
If you are interested, please send us gerbers to RFQ.
Looking forward to hearing from you soon.
Sincerely Yours,


Shenzhen changsheng Industry Co.,Ltd
Rm501-506,Building 3C,XiChengShangZhu Garden, BaoAn CBD,ShenZhen China
Skype: Ella PCB
Tel: 0086-0755-29668356